Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 87)

6–14 Configuration: Symbology
Publication 2755-833
Decode Direction (Scanner A or B) (Pharma-Code Decoders Only)
Field Type Options
Select
Forward
Reverse
Sets the direction the decoder uses to decode a scanned label.
Direction values are either Forward or Reverse. The default is
Forward.
The decoder uses the decode direction to determine the least
significant bar of a symbol. The examples below show how a
Pharma-Code label is decoded depending on the direction.
Example 1: The decode direction is set to forward. The decode
direction fixes the position of the least significant bar (regardless of
scan direction). The decoded value is 94.
94
Least Significant Bar Most Significant Bar
Decode Direction = Forward
Decoded Value = 94
Scan Direction
Decode Direction
Example 2: The decode direction is set to reverse. The decode
direction fixes the position of the least significant bar. The decoded
value is 125.
125
Most Significant Bar Least Significant Bar
Decode Direction = Reverse
Decoded Value = 125 Scan Direction
Decode Direction
Wide to Narrow Bar Ratio (Pharma-Code Decoders Only)
Field Type Options
Edit
2 through 4 (2)
Midrange
Specifies the minimum ratio of the widest bar to the narrowest bar
within a symbol.
Valid settings are 2 to 4, or midrange. The default is 2. The default
value for this parameter has been optimized for most
applications, and it is unlikely you will ever have a reason to
change it.
If the setting is 2 to 4, the decoder will reject symbols whose wide to
narrow bar ratio is less than the parameter setting.